refactor: rename package errors to zerrors (#7039)

* chore: rename package errors to zerrors

* rename package errors to gerrors

* fix error related linting issues

* fix zitadel error assertion

* fix gosimple linting issues

* fix deprecated linting issues

* resolve gci linting issues

* fix import structure

---------

Co-authored-by: Elio Bischof <elio@zitadel.com>

internal/zerrors/unimplemented.go

@@ -0,0 +1,46 @@
+package zerrors
+
+import (
+	"fmt"
+)
+
+var (
+	_ Unimplemented = (*UnimplementedError)(nil)
+	_ Error         = (*UnimplementedError)(nil)
+)
+
+type Unimplemented interface {
+	error
+	IsUnimplemented()
+}
+
+type UnimplementedError struct {
+	*ZitadelError
+}
+
+func ThrowUnimplemented(parent error, id, message string) error {
+	return &UnimplementedError{CreateZitadelError(parent, id, message)}
+}
+
+func ThrowUnimplementedf(parent error, id, format string, a ...interface{}) error {
+	return ThrowUnimplemented(parent, id, fmt.Sprintf(format, a...))
+}
+
+func (err *UnimplementedError) IsUnimplemented() {}
+
+func IsUnimplemented(err error) bool {
+	_, ok := err.(Unimplemented)
+	return ok
+}
+
+func (err *UnimplementedError) Is(target error) bool {
+	t, ok := target.(*UnimplementedError)
+	if !ok {
+		return false
+	}
+	return err.ZitadelError.Is(t.ZitadelError)
+}
+
+func (err *UnimplementedError) Unwrap() error {
+	return err.ZitadelError
+}